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updating for linkedin

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This commit is contained in:
Brett Weiland 2023-01-12 13:41:48 -06:00
parent 94304b11e7
commit b666668d0e
18 changed files with 399 additions and 111 deletions
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docs/mega_datasheet.pdf Normal file
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src/backup Normal file
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@ -0,0 +1,89 @@
#include <avr/io.h>
#include <stdio.h>
#include <string.h>
#include <util/delay.h>
#include "i2c.h"
#include "br24t_eeprom_driver.h"
#include "uart.h"
#include "pins.h"
#include "debug.h"
#define EEPROM_ADDR 0x57
#define EEPROM_PAGE_SIZE 64
//for burning eeprom
#define MAGIC_SYN 0xdeadbeef
#define MAGIC_ACK 0xf00dd00d
#define PAGE_WRITE_OK 0x00
#define PAGE_WRITE_CORRUPTED 0x01
#define PAGE_WRITE_UNKNOWN_ERROR 0xff
#ifdef FLASH_EEPROM
int main() {
LED_DEBUG_DDR |= _BV(LED_DEBUG); //TODO move to debug file or somethin
LED_DEBUG_PORT &= ~(_BV(LED_DEBUG));
i2c_init();
uart_debug_init();
FILE stdout_replacement = FDEV_SETUP_STREAM((void *)uart_debug_sendbyte, NULL, _FDEV_SETUP_WRITE);
FILE stdin_replacement = FDEV_SETUP_STREAM(NULL, (void *)uart_debug_recvbyte, _FDEV_SETUP_READ);
stdout = &stdout_replacement;
stdin = &stdin_replacement;
printf("booted\r\n");
flash_eeprom();
return 0;
}
void flash_eeprom() {
unsigned int page_len;
unsigned int on_byte;
uint8_t eeprom_buffer_out[EEPROM_PAGE_SIZE];
uint8_t eeprom_buffer_in[EEPROM_PAGE_SIZE];
/**
FILE master_in = FDEV_SETUP_STREAM((void *)uart_flash_sendbyte, NULL, _FDEV_SETUP_WRITE);
FILE master_out = FDEV_SETUP_STREAM(NULL, (void *)uart_flash_recvbyte, _FDEV_SETUP_READ);
**/
FILE master_f = FDEV_SETUP_STREAM((void *)uart_flash_sendbyte, NULL, _FDEV_SETUP_WRITE);
printf("waiting for master\r\n");
fread(&page_len, 1, 1, master_out);
printf("%i pages total\r\n", page_len);
for(int page = 0; page < page_len; page++) {
printf("writing page %i...\r\n", page);
fread(eeprom_buffer_out, EEPROM_PAGE_SIZE, 1, &master_in);
fputc(PAGE_WRITE_CORRUPTED, &master_out);
i2c_start(EEPROM_I2C_ADDR, I2C_READ);
i2c_send((uint8_t)(page * EEPROM_PAGE_SIZE) & 0xff);
i2c_send((uint8_t)(page * EEPROM_PAGE_SIZE) >> 8);
for(on_byte = 0; on_byte < EEPROM_PAGE_SIZE; on_byte++)
i2c_send(eeprom_buffer_out[on_byte]);
i2c_stop();
//verify
eeprom_buffer_in[0] = EEPROM_READBYTE(page * EEPROM_PAGE_SIZE);
//eeprom_buffer_in[0] = i2c_read_reg_addr16(EEPROM_I2C_ADDR, page * EEPROM_PAGE_SIZE);
i2c_start(EEPROM_I2C_ADDR, I2C_READ);
for(on_byte = 1; on_byte < EEPROM_PAGE_SIZE; on_byte++)
eeprom_buffer_in[on_byte] = i2c_recv();
i2c_stop();
if(memcmp(eeprom_buffer_in, eeprom_buffer_out, EEPROM_PAGE_SIZE)) {
fputc(PAGE_WRITE_CORRUPTED, &master_out);
printf("invalid checksum on page %i!", page);
}
fputc(PAGE_WRITE_OK, &master_out);
}
printf("If you ever read this, you should be happy\r\n");
}
#endif

71
src/br24t_eeprom_driver.c
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@ -21,22 +21,66 @@
#ifdef FLASH_EEPROM
int main() {
LED_DEBUG_DDR |= _BV(LED_DEBUG); //TODO move to debug file or somethin
LED_DEBUG_PORT &= ~(_BV(LED_DEBUG));
i2c_init();
uart_debug_init();
FILE stdout_replacement = FDEV_SETUP_STREAM((void *)uart_debug_sendbyte, NULL, _FDEV_SETUP_WRITE);
FILE stdin_replacement = FDEV_SETUP_STREAM(NULL, (void *)uart_debug_recvbyte, _FDEV_SETUP_READ);
stdout = &stdout_replacement;
stdin = &stdin_replacement;
printf("booted\r\n\r\n");
uart_flash_init();
flash_eeprom();
return 0;
}
void flash_eeprom() {
uint16_t page_len;
uint8_t on_byte;
unsigned int page_len;
unsigned int on_byte;
uint8_t eeprom_buffer_out[EEPROM_PAGE_SIZE];
uint8_t eeprom_buffer_in[EEPROM_PAGE_SIZE];
/**
FILE master_f = FDEV_SETUP_STREAM((void *)uart_flash_sendbyte, NULL, _FDEV_SETUP_WRITE);
**/
FILE master_fin = FDEV_SETUP_STREAM(NULL, (void *)uart_flash_recvbyte, _FDEV_SETUP_READ);
FILE master_fout = FDEV_SETUP_STREAM((void *)uart_flash_sendbyte, NULL, _FDEV_SETUP_WRITE);
fread(&page_len, 1, 1, stdin);
FILE master_f;
char temp_buffer[15];
int blah = 0;
int debug = 0;
unsigned int tots_blah = 0;
for(;;) {
if(blah > 9) blah = 0;
blah++;
tots_blah++;
debug = fread(temp_buffer, 12, 1, &master_fin);
printf("PACKET %i : fread status: %i, error: %i, eof: %i\r\n", tots_blah, debug, ferror(&master_fin), feof(&master_fin));
printf("recv: %s\r\n\r\n\r\n", temp_buffer);
snprintf(temp_buffer, 12, "debugstr %i\r\n", blah);
printf("sending \"%s\"...\r\n", temp_buffer);
fwrite(temp_buffer, 12, 1, &master_fout);
memset(temp_buffer, 0, 12);
}
printf("waiting for master\r\n");
fread(&page_len, 1, 1, &master_f);
printf("%i pages total\r\n", page_len);
for(int page = 0; page < page_len; page -= page_len) {
for(int page = 0; page < page_len; page++) {
printf("writing page %i...\r\n", page);
fread(eeprom_buffer_out, EEPROM_PAGE_SIZE, 1, stdin);
//fread(eeprom_buffer_out, 11, 1, stdin);
fputc(PAGE_WRITE_CORRUPTED, stdout);
DEBUG_LED_ON();
for(;;);
fread(eeprom_buffer_out, EEPROM_PAGE_SIZE, 1, &master_f);
fputc(PAGE_WRITE_CORRUPTED, &master_f);
i2c_start(EEPROM_I2C_ADDR, I2C_READ);
i2c_send((uint8_t)(page * EEPROM_PAGE_SIZE) & 0xff);
@ -53,11 +97,12 @@ void flash_eeprom() {
eeprom_buffer_in[on_byte] = i2c_recv();
i2c_stop();
if(!memcmp(eeprom_buffer_in, eeprom_buffer_out, EEPROM_PAGE_SIZE)) {
fputc(PAGE_WRITE_CORRUPTED, stdout);
for(;;); //TODO error here
if(memcmp(eeprom_buffer_in, eeprom_buffer_out, EEPROM_PAGE_SIZE)) {
fputc(PAGE_WRITE_CORRUPTED, &master_f);
printf("invalid checksum on page %i!", page);
}
fputc(PAGE_WRITE_OK, stdout);
fputc(PAGE_WRITE_OK, &master_f);
}
printf("If you ever read this, you should be happy\r\n");
}
#endif

2
src/compile_commands.json
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@ -115,7 +115,7 @@
"directory": "/home/indigo/projects/watch/src",
"arguments": [
"/home/indigo/packs/avr8-gnu-toolchain-linux_x86_64/bin/avr-gcc",
"-mmcu=atmega328p",
"-mmcu=atmega2560",
"-I",
"/home/indigo/packs/avr8-gnu-toolchain-linux_x86_64/avr/include",
"-o",

18
src/compile_eeprom.py
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@ -18,7 +18,6 @@ page_bit_height = 8
page_cnt = 4
#fonts
# for some reason BdfFontFile.BdfFontFile.bitmap doesn't have proper spacing
# so we'll just manually go through each character ourselves
@ -27,6 +26,7 @@ page_cnt = 4
# get to big for litteraly no reason
header.write("/** GENERATED BY EEPROM COMPILER SCRIPT **/\r\n\r\n")
header.write("#include \"paint.h\"\r\n")
header.write("// FONTS\r\n")
for file in os.listdir("{}/fonts/".format(data_path)):
@ -36,20 +36,28 @@ for file in os.listdir("{}/fonts/".format(data_path)):
font_bdf = BdfFontFile.BdfFontFile(font_fd)
font_name = file.split('.')[0].capitalize()
header.write("#define FONT_{}_ADDR\t0x{:04x}\r\n".format(font_name, output.tell()))
#header.write("#define FONT_{}_ADDR\t0x{:04x}\r\n".format(font_name, output.tell()))
header.write("font_t FONT_{} = {{ \r\n".format(font_name))
first_char = False
for char in enumerate(font_bdf.glyph):
if char[1]:
if not first_char:
first_char = True
header.write(("#define FONT_{}_FIRST_CHAR\t{}\r\n"
"#define FONT_{}_WIDTH\t{}\r\n"
"#define FONT_{}_HEIGHT\t{}\r\n").format(
header.write((
" .FONT_{}_WIDTH\t{}\r\n"
" .FONT_{}_HEIGHT\t{}\r\n").format(
font_name, char[0],
font_name, char[1][-1].size[0],
font_name, char[1][-1].size[1]))
# header.write(("#define FONT_{}_FIRST_CHAR\t{}\r\n"
# "#define FONT_{}_WIDTH\t{}\r\n"
# "#define FONT_{}_HEIGHT\t{}\r\n").format(
# font_name, char[0],
# font_name, char[1][-1].size[0],
# font_name, char[1][-1].size[1]))
output.write(char[1][-1].tobytes('raw'))
header.write("}\r\n")
header.write("\r\n\r\n// IMAGES\r\n#define IMG_BEGIN\t0x{:04x}\r\n".format(output.tell()))

10
src/debug.c
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@ -16,6 +16,13 @@
#define I2C_WRITE 0
#define I2C_READ 1
void debug_crash() {
for(;;) {
LED_DEBUG_PORT ^= _BV(LED_DEBUG);
_delay_ms(500);
}
}
void scroll_test() {
//sets scroll area to whole screen
i2c_write_reg_multi(SSD1306_ADDR, SSD1306_CMD_REG, 3, (uint8_t[]){0xa3, 0x00, 0x20});
@ -92,10 +99,11 @@ void test_timer() {
}
void eeprom_testbyte() {
uint8_t data_in = 0xde;
uint8_t data_in = 0xdf;
uint8_t data_out = 0;
printf("writing 0x%x to eeprom...\r\n", data_in);
EEPROM_WRITEBYTE(0x0000, data_in);
_delay_ms(10); //max write cycle time
data_out = EEPROM_READBYTE(0x0000);
printf("byte read from eeprom: 0x%x\r\n", data_out);
}

1
src/debug.h
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@ -13,6 +13,7 @@ void screen_lowlvl_testdraw();
void uart_echo();
void test_clock();
void eeprom_testbyte();
void debug_crash();
unsigned int ticks_to_seconds();
#define DEBUG_LED_ON() LED_DEBUG_PORT |= _BV(LED_DEBUG)

73
src/eeprom_address.h
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@ -1,42 +1,43 @@
/** GENERATED BY EEPROM COMPILER SCRIPT **/
#include "paint.h"
// FONTS
#define FONT_5thelement_ADDR 0x0000
#define FONT_5thelement_FIRST_CHAR 32
#define FONT_5thelement_WIDTH 4
#define FONT_5thelement_HEIGHT 5
#define FONT_Bitbuntu_ADDR 0x01db
#define FONT_Bitbuntu_FIRST_CHAR 32
#define FONT_Bitbuntu_WIDTH 0
#define FONT_Bitbuntu_HEIGHT 0
#define FONT_Bitocra-13_ADDR 0x067b
#define FONT_Bitocra-13_FIRST_CHAR 32
#define FONT_Bitocra-13_WIDTH 7
#define FONT_Bitocra-13_HEIGHT 13
#define FONT_Bitocra-13-full_ADDR 0x1014
#define FONT_Bitocra-13-full_FIRST_CHAR 32
#define FONT_Bitocra-13-full_WIDTH 7
#define FONT_Bitocra-13-full_HEIGHT 13
#define FONT_4thd_ADDR 0x19ad
#define FONT_4thd_FIRST_CHAR 32
#define FONT_4thd_WIDTH 4
#define FONT_4thd_HEIGHT 4
#define FONT_Bitocra_ADDR 0x1b29
#define FONT_Bitocra_FIRST_CHAR 32
#define FONT_Bitocra_WIDTH 0
#define FONT_Bitocra_HEIGHT 0
#define FONT_Bitocra7_ADDR 0x1fbd
#define FONT_Bitocra7_FIRST_CHAR 0
#define FONT_Bitocra7_WIDTH 4
#define FONT_Bitocra7_HEIGHT 7
#define FONT_Bitbuntu-full_ADDR 0x24fd
#define FONT_Bitbuntu-full_FIRST_CHAR 32
#define FONT_Bitbuntu-full_WIDTH 6
#define FONT_Bitbuntu-full_HEIGHT 10
#define FONT_Bitocra-full_ADDR 0x2c69
#define FONT_Bitocra-full_FIRST_CHAR 32
#define FONT_Bitocra-full_WIDTH 6
#define FONT_Bitocra-full_HEIGHT 11
font_t FONT_5thelement = {
.FONT_5thelement_WIDTH 32
.FONT_5thelement_HEIGHT 4
}
font_t FONT_4thd = {
.FONT_4thd_WIDTH 32
.FONT_4thd_HEIGHT 4
}
font_t FONT_Bitocra-13-full = {
.FONT_Bitocra-13-full_WIDTH 32
.FONT_Bitocra-13-full_HEIGHT 7
}
font_t FONT_Bitocra-13 = {
.FONT_Bitocra-13_WIDTH 32
.FONT_Bitocra-13_HEIGHT 7
}
font_t FONT_Bitocra = {
.FONT_Bitocra_WIDTH 32
.FONT_Bitocra_HEIGHT 0
}
font_t FONT_Bitbuntu = {
.FONT_Bitbuntu_WIDTH 32
.FONT_Bitbuntu_HEIGHT 0
}
font_t FONT_Bitocra-full = {
.FONT_Bitocra-full_WIDTH 32
.FONT_Bitocra-full_HEIGHT 6
}
font_t FONT_Bitbuntu-full = {
.FONT_Bitbuntu-full_WIDTH 32
.FONT_Bitbuntu-full_HEIGHT 6
}
font_t FONT_Bitocra7 = {
.FONT_Bitocra7_WIDTH 0
.FONT_Bitocra7_HEIGHT 4
}
// IMAGES

6
src/i2c.c
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@ -37,7 +37,7 @@
*
*/
void error() { }
void error() { debug_crash(); }
void i2c_init() {
TWBR = 12;
@ -61,7 +61,7 @@ void i2c_start(uint8_t addr, bool rw) {
loop_until_bit_is_set(TWCR, TWINT);
if(((TWSR & 0xf8) != (TW_MT_SLA_ACK)) && (TWSR & 0xf8) != (TW_MR_SLA_ACK)) {
#ifdef DEBUG_BUILD
#if DEBUG_BUILD
printf("unhandled NACK in address transmission\
TWCR: 0x%x\
TWSR: 0x%x\r\n", TWCR, (TWSR & ~(0b11)));
@ -71,7 +71,7 @@ void i2c_start(uint8_t addr, bool rw) {
}
void i2c_stop() { TWCR = (_BV(TWSTO) | _BV(TWEN) | _BV(TWINT)); _delay_ms(500); }
void i2c_stop() { TWCR = (_BV(TWSTO) | _BV(TWEN) | _BV(TWINT)); }
void i2c_send(uint8_t byte) {
TWDR = byte; //fist packet is address

19
src/main.c
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@ -26,22 +26,26 @@
#ifndef FLASH_EEPROM
int main() {
LED_DEBUG_DDR |= _BV(LED_DEBUG); //TODO move to debug file or somethin
LED_DEBUG_PORT &= ~(_BV(LED_DEBUG));
//initlizes i2c, right now only speed //TODO don't delegate a whole function if desired
i2c_init();
//screen_init();
#if defined(DEBUG_BUILD) || defined(FLASH_EEPROM)
screen_init();
#ifdef DEBUG_BUILD
uart_init();
FILE stdout_replacement = FDEV_SETUP_STREAM((void *)uart_sendbyte, NULL, _FDEV_SETUP_WRITE);
FILE stdin_replacement = FDEV_SETUP_STREAM(NULL, (void *)uart_recvbyte, _FDEV_SETUP_READ);
uart_debug_init();
FILE stdout_replacement = FDEV_SETUP_STREAM((void *)uart_debug_sendbyte, NULL, _FDEV_SETUP_WRITE);
FILE stdin_replacement = FDEV_SETUP_STREAM(NULL, (void *)uart_debug_recvbyte, _FDEV_SETUP_READ);
stdout = &stdout_replacement;
stdin = &stdin_replacement;
//screen_lowlvl_testdraw();
//eeprom_testbyte();
printf("booted\n");
screen_lowlvl_testdraw();
eeprom_testbyte();
//test_clock();
#endif
@ -60,5 +64,6 @@ int main() {
return 0;
}
#endif

16
src/makefile
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@ -4,16 +4,17 @@ CC=$(TOOLCHAIN_DIR)/bin/avr-gcc
LD=$(TOOLCHAIN_DIR)/bin/avr-ld
INC=$(TOOLCHAIN_DIR)/avr/include
OUT=compiled_payload.elf
#DEVICE=atmega2560
DEVICE=atmega328p
DEVICE=atmega2560
#DEVICE=atmega328p
F_CPU=16000000
DEBUG=1
#avrdude options
#PARTNO=ATmega2560
PARTNO=ATmega328p
PARTNO=ATmega2560
#PARTNO=ATmega328p
PORT=/dev/ttyUSB0
DEBUG_PORT=/dev/ttyACM0 #only works on atmega2560, intented for debugging flashing
BAUD=115200
@ -41,8 +42,8 @@ eeprom:
./compile_eeprom.py
eeprom_install:
$(CC) -mmcu=$(DEVICE) -I $(INC) -o $(OUT) -DFLASH_EEPROM -DDEBUG_BUILD=$(DEBUG) -DBAUD=$(RUNTIME_BAUDRATE) -DF_CPU=$(F_CPU) -Wall -O1 main.c debug.c i2c.c ssd1306_display_driver.c uart.c br24t_eeprom_driver.c paint.c -Wall
doas avrdude -B 1 -v -p $(PARTNO) -c usbtiny -U flash:w:$(OUT):e
$(CC) -mmcu=atmega2560 -I $(INC) -o $(OUT) -DFLASH_EEPROM -DDEBUG_BUILD=$(DEBUG) -DBAUD=$(RUNTIME_BAUDRATE) -DF_CPU=$(F_CPU) -Wall -O1 main.c debug.c i2c.c ssd1306_display_driver.c uart.c br24t_eeprom_driver.c paint.c -Wall
doas avrdude -B 1 -v -p ATmega2560 -c usbtiny -U flash:w:$(OUT):e
install: $(OUT)
@ -51,7 +52,8 @@ install: $(OUT)
screen:
doas avrdude -c usbtiny -p $(PARTNO)
doas screen $(PORT) $(RUNTIME_BAUDRATE)
#doas screen $(PORT) $(RUNTIME_BAUDRATE)
doas screen $(DEBUG_PORT) $(RUNTIME_BAUDRATE)
clean:
rm -f *.o *.elf compiled_eeprom

5
src/paint.c
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@ -31,5 +31,8 @@ void draw_hline(int pos_y) {
screen_buffer[((pos_y / 8) * 8) + on_pix] |= (1 << (pos_y % 8));
}
void draw_text(char *text, int x, int y, EEPROM_ADDR font) {
//also here
void draw_text(char *text, int x, int y, font_t font) {
for(int c = 0; text[c] == 0; c++) {
}
}

10
src/paint.h
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@ -4,10 +4,18 @@
#include "ssd1306_display_driver.h"
#include "br24t_eeprom_driver.h"
typedef const struct font {
EEPROM_ADDR *font;
uint8_t width;
uint8_t height;
uint16_t first_char;
} font_t;
void screen_clear();
void draw_image(EEPROM_ADDR image);
void draw_hline(int pos_y);
void draw_text(char *text, int x, int y, EEPROM_ADDR font);
void draw_text(char *text, int x, int y, font_t font);
#endif

27
src/pins.h
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@ -1,4 +1,5 @@
#ifndef __PINS_INC
#define __PINS_INC
/**
* CTS is connected to CTS, CTS is 1 when we are ready
* scope pins:
@ -7,19 +8,39 @@
* 3: desktop rts
* 4: desktop cts
*/
#define __PINS_INC
#include <avr/io.h>
#ifdef __AVR_ATmega328P__
#define UART_DDR DDRD
#define UART_CTS PD2 //cyan
#define UART_RTS PD3 //yellow
#define UART_CTS PD2
#define UART_RTS PD3
#define UART_PORT PORTD
#define LED_DEBUG_DDR DDRB
#define LED_DEBUG_PORT PORTB
#define LED_DEBUG PB5
#elif __AVR_ATmega2560__
#define UART_DDR DDRB
#define UART_CTS PB6
#define UART_RTS PB5
#define UART_PORT PORTB
#define UART_PIN PINB
#define LED_DEBUG_DDR DDRB
#define LED_DEBUG_PORT PORTB
#define LED_DEBUG PB7
#else
#error "Only have arduino and arduino mega pin mappings!"
#endif
#endif
/**
yelow = slave rts/master cts
cyan = slave cts/master rts
pink = slave tx/master tx
blue = slave rx/slave tx
**/

80
src/uart.c
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@ -1,7 +1,9 @@
#include <avr/io.h>
#include <stdio.h>
#include <util/setbaud.h>
#include <util/delay.h>
#include "pins.h"
#include "debug.h"
/** UART notes
* UCSR0A:
@ -39,29 +41,18 @@
*
**/
//TODO replace with static void and just use high level functions?
void uart_sendbyte(uint8_t byte) {
UART_PORT &= ~(_BV(UART_RTS)); //us: ready to send
loop_until_bit_is_clear(UART_PORT, UART_CTS); //them: go ahead
//also wait for buffer to be empty, should never be a problem
loop_until_bit_is_set(UCSR0A, UDRE0); //done recieving
void uart_debug_sendbyte(uint8_t byte) {
loop_until_bit_is_set(UCSR0A, UDRE0);
UDR0 = byte;
UART_PORT |= _BV(UART_RTS); //keep in mind cts is inverted; low is 1 and high is 0
}
//TODO replace with static void and just use high level functions?
uint8_t uart_recvbyte() {
loop_until_bit_is_clear(UART_PORT, UART_CTS); //wait for their request
UART_PORT &= ~(_BV(UART_RTS)); //hey, you can send now
loop_until_bit_is_set(UCSR0A, RXC0); //wait for them to actually send
UART_PORT |= _BV(UART_RTS); //okay, you can no longer send
uint8_t uart_debug_recvbyte() {
loop_until_bit_is_set(UCSR0A, RXC0);
UART_PORT |= _BV(UART_RTS);
return UDR0;
}
void uart_init() {
//set baud rate
UART_DDR |= _BV(UART_RTS);
UART_PORT |= _BV(UART_RTS); //keep in mind cts is inverted; low is 1 and high is 0
void uart_debug_init() {
UBRR0H = UBRRH_VALUE;
UBRR0L = UBRRL_VALUE;
@ -82,3 +73,58 @@ TODO figure out why USE_2X is enable when it shoudn't be
UCSR0B = (_BV(RXEN0) | _BV(TXEN0));
}
#ifdef FLASH_EEPROM
//this uart port recieves from the computer and writes the eeprom
void uart_flash_init() {
//syncronization
UART_DDR |= _BV(UART_RTS);
UART_DDR &= ~(_BV(UART_CTS)); //keep in mind cts/rts is inverted; low is 1 and high is 0
UART_PORT |= _BV(UART_RTS); //keep in mind cts/rts is inverted; low is 1 and high is 0
//for serial speed, we'll just use the same speed for now
UBRR1H = UBRRH_VALUE;
UBRR1L = UBRRL_VALUE;
UCSR1A &= ~(_BV(U2X1));
UCSR1C = ((_BV(UCSZ11)) | _BV(UCSZ10)); // set 8 bit char size, yes the '=' is intentional
UCSR1B = (_BV(RXEN1) | _BV(TXEN1));
//when the master initates serial via pyserial, for some reason it pulls our CTS low
//for a brief moment. This hack avoids that
printf("waiting for unwanted initation pulse...\r\n");
loop_until_bit_is_clear(UART_PIN, UART_CTS);
loop_until_bit_is_set(UART_PIN, UART_CTS);
printf("complete\r\n");
}
void uart_flash_sendbyte(uint8_t byte) {
printf("send start\r\n");
if(UART_PORT & _BV(UART_CTS)) {
printf("send conflict!\r\n");
debug_crash(); //make sure they're not trying to send
}
UART_PORT &= ~(_BV(UART_RTS)); //us: ready to send
printf("waiting on master\r\n");
loop_until_bit_is_clear(UART_PIN, UART_CTS); //them: go ahead
printf("waiting for transmit buffer\r\n");
loop_until_bit_is_set(UCSR1A, UDRE1); //wait until buffer is empty
UDR1 = byte;
UART_PORT |= _BV(UART_RTS); //okay, we be done sending
printf("done splurting out the data, still need to mark end of packet\r\n");
loop_until_bit_is_set(UART_PIN, UART_CTS); //wait for them to get the message so we don't double dip
printf("we be done tho\r\n");
}
uint8_t uart_flash_recvbyte() {
char byte_in;
loop_until_bit_is_clear(UART_PIN, UART_CTS); //wait for their request
UART_PORT &= ~(_BV(UART_RTS)); //hey, you can send now
loop_until_bit_is_set(UCSR1A, RXC1); //wait for them to actually send
byte_in = UDR1;
UART_PORT |= _BV(UART_RTS); //okay, you can no longer send
loop_until_bit_is_set(UART_PIN, UART_CTS); //wait for them to get the message so we don't double dip
return byte_in;
}
#endif

10
src/uart.h
View File

@ -1,8 +1,12 @@
#ifndef __UART_INC
#define __UART_INC
void uart_init();
void uart_sendbyte(uint8_t byte);
uint8_t uart_recvbyte();
void uart_debug_init();
void uart_debug_sendbyte(uint8_t byte);
uint8_t uart_debug_recvbyte();
void uart_flash_init();
void uart_flash_sendbyte(uint8_t byte);
uint8_t uart_flash_recvbyte();
#define HARDWARE_FLOW 1 //TODO
#endif

54
src/write_eeprom.py
View File

@ -22,55 +22,83 @@ eeprom_file = open("./compiled_eeprom", "rb")
eeprom_filesize = os.fstat(eeprom_file.fileno()).st_size
page_len = ceil(eeprom_filesize / EEPROM_PAGESIZE)
s = serial.Serial(port=args.port, baudrate=args.baud, parity=serial.PARITY_NONE, timeout=0, dsrdtr=1)
s = serial.Serial(port=args.port, baudrate=args.baud, parity=serial.PARITY_NONE, timeout=0, rtscts=0, dsrdtr=0, write_timeout = 0)
s.rts = 0
#slow method
def write_hwf(data):
#check if the other guy is already trying to send
debugval = 0
print("writing")
data_parsed = [data[b:b+1] for b in range(len(data))]
for c in data_parsed:
print(debugval)
if s.cts:
print("Slave is trying to send before we do!")
exit(1)
debugval += 1
s.rts = 1
while not s.cts:
pass
s.rts = 0
s.write(c)
while s.cts:
pass
s.rts = 0
print("done writing")
def read_hwf(length):
print("reading")
msg = b''
for c in range(length):
s.rts = 1
print("waiting for CTS")
while not s.cts:
pass
s.rts = 0
s.rts = 1
msg += s.read(size=1)
s.rts = 0
print("waiting for CTS to go back up, recieved {}".format(msg))
while s.cts:
pass
print("done reading")
return(msg)
def handle_writer_error(write_status):
if write_status == 1: # verification failed
print("Verification failed on page {}!".format(page))
elif write_status == 0xff:
print("Unknown error writing page {}!".format(page))
#def handle_writer_error(write_status):
#while True:
# write_hwf(b"abcdef\r\n")
# print(read_hwf(10))
input()
blah = 0
tots_blah = 0
while True:
tots_blah += 1
print("PACKET {}".format(tots_blah))
if blah > 8:
blah = 0
blah += 1
write_hwf(bytes("Debugstr {}\r\n".format(blah), 'UTF-8'))
print(read_hwf(12))
print(page_len)
write_hwf(page_len.to_bytes(1, 'little'))
for page in range(0, page_len):
print(page)
print("PAGE: {}".format(page))
if EEPROM_PAGESIZE > (eeprom_filesize - eeprom_file.tell()):
print("writing and padding last page")
write_hwf(eeprom_file.read())
[write_hwf(b'\x00') for b in range(0, eeprom_filesize % EEPROM_PAGESIZE)]
else:
write_hwf(eeprom_file.read(EEPROM_PAGESIZE))
write_status = read_hwf(1)
write_status = int(read_hwf(1))
print("WRITE STATUS: {}".format(write_status))
if not write_status == 0:
handle_writer_error(write_status)
if write_status == 0:
pass
elif write_status == 1: # verification failed
print("Verification failed on page {}!".format(page))
elif write_status == 0xff:
print("Unknown error writing page {}!".format(page))
print("Done writing to EEPROM!\n")

19
tests/xy_to_page.py Executable file
View File

@ -0,0 +1,19 @@
#!/usr/bin/env python3
#
(int(xy / 16) * 16) + int((((xy - (int(xy / 16) * 16)))) / 8) + ((xy - ((int(xy / 16) * 16) + int(((xy - (int(xy / 16) * 16))) / 8) * 8)) * 2)
BLEN = 2
WIDTH = 8
HEIGHT = 4
for xy in range(0, 32):
page_offset = int(xy / (BLEN * WIDTH)) * (BLEN * WIDTH)
collumn_offset = int((xy - page_offset) / WIDTH)
bit_offset = page_offset + collumn_offset + ((xy - (page_offset + collumn_offset * WIDTH)) * BLEN)
page_location = bit_offset
print(page_location)
#print("pixel {}: bit {}".format(xy, column_offset))